RE: Pennzoil air cooled, what percentage?
The advice Cap'n John gave you was very good. Ask the engine mfg. to be sure. They make the engine. I know Brilelli said 32:1 or 40:1 for break in. Then I think he said 50:1 is fine.
Opinions are like @#$%&*#$, everyone has one.... heh heh.